Patient-specific instrumentation for implant revision surgery

  • US 10,271,886 B2
  • Filed: 07/23/2013
  • Issued: 04/30/2019
  • Est. Priority Date: 07/23/2012
  • Status: Active Grant
First Claim
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1. A method for creating a patient specific instrumentation (PSI) jig for implant revision, comprising:

  • obtaining a model of at least part of a bone requiring removal of an implanted implant being mounted to the bone, the model being physiologically patient specific and being obtained from imaging of the implanted implant as installed on the bone;

    obtaining a model of a replacement implant used to replace the implanted implant on the bone;

    identifying alterations to the bone through the removal of the implanted implant using the model of the bone and data related to the implanted implant;

    identifying at least one anchor surface for the PSI jig on the bone, the anchor surface being in close proximity to the implanted implant, the anchor surface selected for being unaltered through the removal of the implanted implant; and

    generating a jig model using at least the identified anchor surface and the model of the replacement implant, the jig model comprising at least one patient specific contact surface corresponding to the identified anchor surface for complementary contact, and at least one tool interface portion positioned and/or oriented relative to the at least one contact surface, the at least one tool interface portion adapted to be interfaced with a tool altering the bone for subsequently installing the replacement implant after removal of the implanted implant.

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